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| 1 | 肾嗜酸细胞瘤的影像学诊断显示文摘目的:探讨肾嗜酸细胞瘤(R0)的影像学表现,以提高对其诊断的准确性。方法:回顾性分析经病理证实的12例RO患者的影像资料。12例均行MSCT平扫及多期增强扫描,包括肾皮质期、髓质期和排泄期(5例)增强扫描;有3例同时行MRI检查。结果:CT平扫示12例病灶均为单发,7例位于左肾,5例位于右肾,最大径2.0~11.6cm,平均5.8cm,〈3.0cm者3例。增强扫描:肾皮质期示10例病灶明显强化,其中8例强化低于肾皮质,2例强化接近于肾皮质;肾髓质期示7例病灶强化程度下降并低于肾脏髓质的密度,3例病灶持续强化、于排泄期见密度开始下降,2例病灶在皮质期~排泄期表现为持续强化;6例病灶内可见星芒样瘢痕,8例有完整包膜,3例可见钙化。3例病灶于MRI T1WI上呈等、低信号,T2WI呈相对均匀的高信号,3例均见完整包膜。结论:RO的影像学表现有一定特征性,多表现为增强后均匀强化,无囊变或坏死,T2WI上可见完整的低信号包膜,有助于同各类型肾癌鉴别。 | 毕文杰 Manavendra Upadhyaya 刘玉 邵丹丹 李卫侠 谢洁林 陈克敏 | 2008 | 放射学实践2008，23，3： | 24 |
| 2 | 双期薄层动态增强CT在胰岛素瘤术前诊断中的价值显示文摘目的:定量分析胰岛素瘤动态增强扫描各期相的强化特点,探讨胰岛素瘤术前CT诊断的价值。方法:回顾性分析38例经手术及病理证实的胰岛素瘤患者的影像学资料,对肿瘤的形态特点、各期相的强化方式和强化程度及CT定位诊断的敏感度及假阴性的潜在原因等进行分析。结果:胰岛素瘤术前薄层双期增强CT诊断的敏感度为81.6%,单纯动脉期CT诊断的敏感度为81.6%,门静脉期为60.5%,两者间的差异有统计学意义(P=0.043)。胰岛素瘤平扫时平均CT值(40.32±8.13)HU,周围正常胰腺组织平均CT值为(44.48±6.75)HU,两者差异有极显著性意义(P<0.001)。38例中有36例肿瘤至少在一个期相上强化明显。动脉期胰岛素瘤的平均CT值(113.66±27.26)HU,周围正常胰腺组织为(80.5±15.43)HU;门静脉期胰岛素瘤的平均CT值为(111.59±19.05)HU,周围正常胰腺组织为(90.5±13.91)HU,两者间差异均有统计学意义(P<0.001)。胰岛素瘤动脉期强化值(73.44±29.23)HU,门静脉期为(71.22±21.64)HU,两者间差异没有统计学意义(P=0.627);胰岛素瘤动脉期较周围正常胰腺组织的强化程度为(33.16±20.64)HU,门静脉期为(20.09±16.31)HU,两者间差异有统计学意义(P=0.006)。7例漏诊的病例中,5例呈等密度,2例为异位胰岛素瘤。结论:薄层双期CT增强扫描对检查胰岛素瘤有较高的敏感性,动脉期扫描的诊断价值大。 | 刘玉 宋琦 金涵弢 方文强 Manavendra Upadhyaya 陈克敏 | 2009 | 放射学实践2009，24，3： | 6 |
| 3 | 胰腺囊性病变的诊断与处置进展显示文摘本文对胰腺囊性病变的临床表现、病理分类、影像学诊断、鉴别诊断及临床处置的进展进行了介绍,着重介绍胰腺囊性病变的超声、CT、MRI等影像学表现的特征。 | Manavendra Upadhyaya 刘玉 陈克敏 | 2008 | 医学影像学杂志2008，18，4： | 3 |
| 4 | Therapeutic endoscopy of localized gastric varices: pretherapy screening and posttreatment evaluation with MDCT portography显示文摘 | Hui Zhu Bei Shi Manavendra Upadhyaya Zhiyuan Wu Xiaozhu Lin Yunlin Wu Kemin Chen | 2010 | Abdominal Imaging2010，，1： | 1 |
| 5 | IMAGING EVALUATION OF SEROUS CYSTADENOMAS AND MUCINOUS CYSTIC TUMORS OF THE PANCREAS显示文摘Objective To evaluate imaging features of the serous cystadenomas and mucinous cystic tumors of the pancreas. Methods The imaging findings in 59 patients with pathologically proven serous cystadenomas (SCs), mucinous cystadenomas (MCs), and mucinous cystadenocarcinomas (MCCs) of the pancreas were reviewed for location, thickness of septa or the cyst wall, number of cysts, diameter of the largest cyst, lesion calcification, presence of mural node or solid enhancing component, dilatation of the main pancreatic duct (MPD), lesion communication with MPD, invasion of surrounding organs, and regional lymphadenopathy.Results The characteristic imaging feature of SCs was that of microcystic lesion with >6 cysts, the diameter of the largest cyst being <2 cm. Mucinous cystic tumors (MCTs) including MCs and MCCs were that of macrocystic lesion with <6 cysts, the diameter of the largest cyst being >2 cm. MCs was that of a lesion with smooth and regular cyst wall and septa, the wall/septa thickness being <0.3 cm. MCCs was that of a cystic lesion with thick irregular septa, presence of mural node or solid enhancing component, invasion of surrounding structures. These findings were of statistical significance. Conclusion SCs, MCs, and MCCs have characteristic imaging features. Analysis of the number of cysts, septation features, mural node or solid enhancing component, diameter of the largest cyst, dilatation of the pancreatic duct, and invasion of surrounding structures often can successfully subtype tumors into benign SCs or potentially malignant MCs or malignant MCCs. | Manavendra Upadhyaya 刘玉 陈克敏 | 2009 | Journal of Shanghai Second Medical University(Foreign Language Edition)2009，21，2： | 0 |
| 6 | SOLID PSEUDOPAPILLARY TUMOR OF THE PANCREAS:CLINICAL AND COMPUTED TOMOGRAPHIC FINDINGS WITH PATHOLOGIC CORRELATION IN 21 CASES显示文摘Objective To correlate the clinical and imaging features of the solid pseudopapillary tumor (SPPT) of the pancreas with the pathologic diagnosis. Methods The computed tomographic findings in 21 patients (18 women and 3 men) with pathologically proven solid pseudopapillary tumor of the pancreas were reviewed retrospectively. Two radiologists reviewed images for location, size and morphology, capsule and margin, density, enhancement pattern, calcification, dilatation of pancreatic duct, lymphadenopathy, vascular invasion, distant metastasis, and recurrence. Results On CT, the lesion presented as solitary, round (28.57%), oval (57.14%), or lobulated (14.28%) mass in pancreatic head (47.62%) with complete capsule (85.71%). Lesions smaller than 4cm in maximum diameter (47.62%) presented as predominantly solid mass whereas lesions greater than 4cm in diameter (52.28%) presented as heterogenous mass. On contrast administration, the viable solid portion of the tumor showed mild peripheral enhancement in arterial phase [enhancement degree<20Hounsfield unit (HU)] with progressive fill in during the portal and hepatic parenchyma phase (enhancement degree 20-40HU). Eighteen lesions (85.7%) had complete capsule. Two lesions (9.5%) had areas of high density (>60HU) on plain CT which due to hemorrhage. Dilatation of the pancreatic duct was rare (25%), and distant metastasis, regional lymphadenopathy, and tumor recurrence were absent. Nine patients (42.85%) had an abdominal CT follow-up for 24.55months (range, 2-60months) post-surgery without recurrence or distant metastasis. Conclusion Solid pseudopapillary tumor of the pancreas usually occurs in young females in the pancreatic head or tail. On CT, they manifest as moderate vascular mixed tumor, progressive enhancement of the viable solid portion, distinct tumor margin with capsule formation, and absence of regional lymphadenopathy. | Manavendra Upadhyaya 刘玉 陈克敏 | 2009 | Journal of Shanghai Second Medical University(Foreign Language Edition)2009，21，1： | 0 |
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